The exceptions to this rule are the pulmonary arteries and veins.
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The pulmonary artery is the one that carries deoxygenated blood from the right side of the heart (ventricle) to the lungs. On the other side, pulmonary veins transfer oxygenated blood from the lungs to the heart (left atrium).</span>
Answer:
the mass of the system must remain constant over time
Explanation:
In other words matters cannot be created or destroyed, the overall amount will remain the same
Exosphere is the lowest because the higher you go the lower the air pressure the lower you go the higher the air pressure. ;) :)
Answer:
click on the photo. this should help. please mark brainliest:)
